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  <title>Converts a variant date/time value to Unix timestamp</title>
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  <div id="layout-content"><div id="function.variant-date-to-timestamp" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">variant_date_to_timestamp</h1>
  <p class="verinfo">(PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">variant_date_to_timestamp</span> &mdash; <span class="dc-title">Converts a variant date/time value to Unix timestamp</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.variant-date-to-timestamp-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>variant_date_to_timestamp</strong></span>(<span class="methodparam"><span class="type"><a href="class.variant.html" class="type variant">variant</a></span> <code class="parameter">$variant</code></span>): <span class="type"><span class="type">?</span><span class="type">int</span></span></div>

  <p class="para rdfs-comment">
   Converts <code class="parameter">variant</code> from a <strong><code>VT_DATE</code></strong>
   (or similar) value into a Unix timestamp.  This allows easier
   interopability between the Unix-ish parts of PHP and COM.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.variant-date-to-timestamp-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">variant</code></dt>

     <dd>

      <p class="para">
       The variant.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.variant-date-to-timestamp-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns a unix timestamp, or <strong><code>null</code></strong> on failure.
  </p>
 </div>

 <div class="refsect1 seealso" id="refsect1-function.variant-date-to-timestamp-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.variant-date-from-timestamp.html" class="function" rel="rdfs-seeAlso">variant_date_from_timestamp()</a> - Returns a variant date representation of a Unix timestamp</span></li>
    <li class="member"><span class="function"><a href="function.date.html" class="function" rel="rdfs-seeAlso">date()</a> - 格式化 Unix 时间戳</span></li>
    <li class="member"><span class="function"><a href="function.strftime.html" class="function" rel="rdfs-seeAlso">strftime()</a> - 根据区域设置格式化本地时间/日期</span></li>
   </ul>
  </p>
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